It’s tempting to treat the cabinet under your kitchen sink as a catch-all. Paper towels, cleaning supplies, small appliances—you name it. But this space can be humid, prone to leaks, and poorly ventilated. That combination makes it risky for storing many common household items. Here are five things you should never keep under your kitchen sink.
1. Reactive Chemicals
Many people store cleaning products under the sink, but this can be dangerous if chemicals are mixed. Bleach and ammonia, for example, create toxic gas when combined. Heat and humidity can also cause containers to degrade, leak, or release fumes. Chemical vapors may even damage plumbing over time. For safety, keep heavy-duty cleaners in a well-ventilated utility closet. If you must store cleaners under the sink, stick to mild ones and use a child lock on the cabinet.
2. Paper Products (Paper Towels, Napkins, Bags)
Paper plus humidity equals mold—and fast. Paper towels, napkins, and paper bags can develop a musty smell or even grow mold, even without direct water exposure. Store these items in a pantry, high shelf, or drawer far from any plumbing to avoid unpleasant surprises.
3. Small Appliances or Electronics
Moisture, heat, and temperature changes can damage cords, motors, and metal parts. Small appliances like hand mixers, blenders, or electric kettles can rust or become fire hazards if exposed to water. Keep them in a dry cabinet or shelf instead of under the sink.
4. Food and Pet Food
Keeping food near cleaning supplies or in damp areas is a recipe for disaster. Moisture can ruin packaging, cause mold, and attract pests like ants, cockroaches, and rodents. Pet treats stored under the sink are especially vulnerable. Always store food in sealed containers away from humidity and potential leaks.
5. Plastic Bags and Recyclables
Plastic bags and wet recyclables can trap moisture, encouraging mold, bad odors, and pests. A stack of grocery bags may seem harmless, but in a humid under-sink cabinet, it can quickly turn into a smelly problem. Use dry bins in a pantry or laundry area for recyclables and bags.
Safe Items for Under the Sink
Not everything is off-limits. Dish soap, sponges, brushes, gloves, and trash bag liners are generally safe. Lay a waterproof mat, check for leaks regularly, and keep the space organized. Treat the cabinet as a utility zone and perform monthly inspections to prevent problems.
The area under your sink may look convenient, but moisture, leaks, and poor ventilation make it risky for many items. Storing the wrong things there—chemicals, paper, electronics, food—can lead to mold, corrosion, pests, or worse. Keep it organized, stick to safe essentials, and you’ll protect both your belongings and your home.
